must corduroy
Regular verb: corduroy - corduroyed- corduroyed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must corduroy
you must corduroy
he must corduroy
we must corduroy
you must corduroy
they must corduroy 	I must be corduroying
you must be corduroying
he must be corduroying
we must be corduroying
you must be corduroying
they must be corduroying	I must have corduroyed
you must have corduroyed
he must have corduroyed
we must have corduroyed
you must have corduroyed
they must have corduroyed	I must have been corduroying
you must have been corduroying
he must have been corduroying
we must have been corduroying
you must have been corduroying
they must have been corduroying	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't corduroy
you mustn't corduroy
he mustn't corduroy
we mustn't corduroy
you mustn't corduroy
they mustn't corduroy 	I mustn't be corduroying
you mustn't be corduroying
he mustn't be corduroying
we mustn't be corduroying
you mustn't be corduroying
they mustn't be corduroying	I mustn't have corduroyed
you mustn't have corduroyed
he mustn't have corduroyed
we mustn't have corduroyed
you mustn't have corduroyed
they mustn't have corduroyed	I mustn't have been corduroying
you mustn't have been corduroying
he mustn't have been corduroying
we mustn't have been corduroying
you mustn't have been corduroying
they mustn't have been corduroying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I corduroy?
must you corduroy?
must he corduroy?
must we corduroy?
must you corduroy?
must they corduroy? 	must I be corduroying?
must you be corduroying?
must he be corduroying?
must we be corduroying?
must you be corduroying?
must they be corduroying? 	must I have corduroyed?
must you have corduroyed?
must he have corduroyed?
must we have corduroyed?
must you have corduroyed?
must they have corduroyed? 	must I have been corduroying?
must you have been corduroying?
must he have been corduroying?
must we have been corduroying?
must you have been corduroying?
must they have been corduroying? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I corduroy?
mustn't you corduroy?
mustn't he corduroy?
mustn't we corduroy?
mustn't you corduroy?
mustn't they corduroy? 	mustn't I be corduroying?
mustn't you be corduroying?
mustn't he be corduroying?
mustn't we be corduroying?
mustn't you be corduroying?
mustn't they be corduroying? 	mustn't I have corduroyed?
mustn't you have corduroyed?
mustn't he have corduroyed?
mustn't we have corduroyed?
mustn't you have corduroyed?
mustn't they have corduroyed? 	mustn't I have been corduroying?
mustn't you have been corduroying?
mustn't he have been corduroying?
mustn't we have been corduroying?
mustn't you have been corduroying?
mustn't they have been corduroying?